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POMassTransit NullReferenceException in ThreadPoolConsumerPool
 

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  1. POMassTransit NullReferenceException in ThreadPoolConsumerPool
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    <p>When running MassTransit in ASP.NET. A <code>NullReferenceException</code> is being thrown, as per the issue reported here: <a href="https://groups.google.com/forum/#!topic/masstransit-discuss/Ms6thQfEhYg" rel="nofollow noreferrer">Google Discussion Group</a></p> <p><strong>Relevant Detail</strong><br> Does anybody know how to gracefully catch the exception when the AppDomain reloads?</p> <p>The stack trace only goes as far as the MassTransit DLL:</p> <pre><code>NullReferenceException in ThreadPoolConsumerPool Locating source for 'd:\BuildAgent-03\work\8d1373c869590c5b\src\MassTransit\Threading\ThreadPoolConsumerPool.cs'. (No checksum.) The file 'd:\BuildAgent-03\work\8d1373c869590c5b\src\MassTransit\Threading\ThreadPoolConsumerPool.cs' does not exist. Looking in script documents for 'd:\BuildAgent-03\work\8d1373c869590c5b\src\MassTransit\Threading\ThreadPoolConsumerPool.cs'... Looking in the projects for 'd:\BuildAgent-03\work\8d1373c869590c5b\src\MassTransit\Threading\ThreadPoolConsumerPool.cs'. The file was not found in a project. Looking in directory 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\crt\src\'... Looking in directory 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\atlmfc\src\mfc\'... Looking in directory 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\atlmfc\src\atl\'... Looking in directory 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\atlmfc\include\'... The debug source files settings for the active solution indicate that the debugger will not ask the user to find the file: d:\BuildAgent-03\work\8d1373c869590c5b\src\MassTransit\Threading\ThreadPoolConsumerPool.cs. The debugger could not locate the source file 'd:\BuildAgent-03\work\8d1373c869590c5b\src\MassTransit\Threading\ThreadPoolConsumerPool.cs'. </code></pre>
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    1. COYou may want to add the relevant parts of the discussion here. Link-only answers are not a good fit for this site and I don't believe Link-only questions are much better.
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    2. COnvoigt - I've added the relevant detail
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    3. COThis is only a suspicion but I think that Mass Transit interferes with the worker thread pool ASP.NET uses to handle requests. We had a similar issue with calling web services from within the ASP.NET application with asynchronous delegates - under high load the pool was ultimately depleted and the performance was terrible. Does it happen under high load or always?
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      1. USWiktor Zychla
 

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